TY  - RPRT
TI  - Acoustic and optical borehole-wall imaging for fractured-rock aquifer studies
AU  - J.H. Williams
AU  - C. D. Johnson
PY  - 2004
DO  - 10.1016/j.jappgeo.2003.06.009
UR  - https://pubs.usgs.gov/publication/70027686
ID  - 70027686
ER  -